Lierda Science & Technology Group Co. Ltd LSD1BTNBLE0000 사용자 설명서

Message length: message length refers to the number of bytes of message content, excluding prefix, 

command ID and message length itself.

Information content: the information content of input command is some input parameters of the 

command execution, while the information content of output response is the result of command execution, 

which is described in details below.

Table 5-2 is detailed specification of output response frame.

Table 5-2 Output response frame format specification

01

Correct command, without additional data, return 04 FC 01 00

XX

Correct command, with additional data, return 04 FC xx (corresponding to 

command ID) xx (message length) xx...(message content)

02

Command error, return 04 FC 02 00

The Bluetooth 4.2 protocol specifies that the pairing password is of 6 digits.

Table 5-3 refers to the detailed description of input command frame.

Table 5-3 Input command frame explanation

Yes

01

Set baud 

rate

115200

01 FC 01 04 XX XX XX XX (uint32, 

low endian) 

The baud rate unit is bps. The range is 

230400~1200. It is transmitted in low 

byte rate, for example, for baud rate 

115200, the hexadecimal is 

0x0001C200, which shall be written as 

00 C2 01 00

04 FC 01 00    Correct setup

04 FC 02 00    Setup error

/

02

Query baud 

rate

/

01 FC 02 00

04 FC 02 04 XX XX XX XX 

(uint32, low endian, the same as 

ID:01) 

04 FC 02 00    false command

Yes

03

Set 

connection 

0x0028 

10ms

01 FC 03 02 XX XX (uint16, low 

endian) 

04 FC 01 00    Correct setup 

04 FC 02 00    Setup error